Each gemstone is unique with a special color birthplace and story. Gemstone come in every colour of the rainbow and are gathered from all corners of the world. With each coloured gemstone possessing a unique creation of beautiful colour. Some gemstone have been treasured since before history began and others were only discovered recently.
Color has three components that are main Hue, Tone and Saturation.
Hue is referred to as the shade, sensation or tint of a color. The GIA GemSet® has 31 Hues which are often used to spell it out virtually all gemstone colours. The GIA that is complete GemSet has 324 sample hue colors with varying Tones and Saturations.
Tone is referred to as the lightness that is relative darkness of a Hue. The GIA Tone Scale is divided in to 11 grades, 0 to 10, with 0 being colorless to 10 being black.
Saturation is referred to as the purity or strength of a Hue. The GIA Saturation Scale is from 1 to 6. The reduced numbers (1, a few) of warm colors such as for example red, orange or tend that is yellow look brownish in addition to cool colors such as for example blue and green have a tendency to look grayish. Level 4 no more shows either brownishness or grayishness, while neither is strong or weak. Level 5 is level and strong 6 being vivid, almost over colored.
Various Gemstone Colors
GIA Hue, Tone & Saturation Scales
|Red-Purple or Purple-Red||0||C – Colorless/white|
|strongly purplish Red|| |
|1||EXL – Extremely Light|
|slightly purplish Red||2||VL – Very Light|
|orangy Red||4||ML – Medium Light|
|Red-Orange or Orange-Red||5||M – Medium|
|reddish Orange||6||MD – Medium Dark|
|Orange||7||D – Dark|
|yellowish Orange||8||VD – Very Dark|
|Yellow||9||EXD – Extremely Dark|
|Yellow-Green or Green-Yellow|
|strongly yellowish Green|
|slightly yellowish Green|
|very slightly bluish Green|
|very strongly bluish Green|
|Green-Blue or Blue-Green|
|very strongly greenish Blue|
|very slightly greenish Blue|
|very slightly grayish(brownish)|
Color by Spectrum Exceptions (Saturation)
|none, colorless or clear|